Animal toothbrush



FIG. 1 is a side elevational view of an animal toothbrush, showing my new design, the opposite side being a mirror image thereof;

FIG. 2 is a right end elevational view thereof;

FIG. 3 is a left end elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof.

The broken line disclosure shown in FIG. 1 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for an animal toothbrush, substantially as shown and described. 